Affiliation: | ;Laboratory of Fisheries and Environmental Oceanography, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, ;National Research Institute of Far Seas Fisheries, Fisheries Research Agency, Shimizu, Shizuoka 424-8633 and ;Kushimoto Marine Park, Arita, Kushimoto, Wakayama 649-3514, Japan |